Effects of the antiestrogen fulvestrant (ICI 182,780) on gene expression of the rat efferent ductules

Effects of the antiestrogen fulvestrant (ICI 182,780) on gene expression of the rat efferent ductules

Author Yasuhara, Fabiana Autor UNIFESP Google Scholar
Oliveira Gomes, Gisele Renata Autor UNIFESP Google Scholar
Siu, Erica Rosanna Autor UNIFESP Google Scholar
Siu, Erica R. Autor UNIFESP Google Scholar
Esteves, Carlos A. Autor UNIFESP Google Scholar
Monteiro, Hugo P. Autor UNIFESP Google Scholar
Oliveira, Cleida A. Google Scholar
Porto, Catarina S. Autor UNIFESP Google Scholar
Lazari, Maria Fatima M. Autor UNIFESP Google Scholar
Suenaga, Claudia Igushi Autor UNIFESP Google Scholar
Marostica, Elisabeth Autor UNIFESP Google Scholar
Porto, Catarina Segreti Autor UNIFESP Google Scholar
Magalhaes Lazari, Maria Fatima Autor UNIFESP Google Scholar
Institution Universidade Federal de São Paulo (UNIFESP)
Abstract The efferent ductules express the highest amount of estrogen receptors ESR1 (ERalpha) and ESR2 (ERbeta) within the male reproductive tract. Treatment of rats with the antiestrogen fulvestrant (ICI 182,780) causes inhibition of fluid reabsorption in the efferent ductules, leading to seminiferous tubule atrophy and infertility. To provide a more comprehensive knowledge about the molecular targets for estrogen in the rat efferent ductules, we investigated the effects of ICI 182,780 treatment on gene expression using a microarray approach. Treatment with ICI 182,780 increased or reduced at least 2-fold the expression of 263 and 98 genes, respectively. Not surprisingly, several genes that encode ion channels and macromolecule transporters were affected. Interestingly, treatment with ICI 182,780 markedly altered the expression of genes related to extracellular matrix organization. Matrix metalloproteinase 7 (Mmp7), osteopontin (Spp1), and neuronal pentraxin 1 (Nptx1) were among the most altered genes in this category. Upregulation of Mmp7 and Spp1 and downregulation of Nptx1 were validated by Northern blot. Increase in Mmp7 expression was further confirmed by immunohistochemistry and probably accounted for the decrease in collagen content observed in the efferent ductules of ICI 182,780-treated animals. Downregulation of Nptx1 probably contributed to the extracellular matrix changes and decreased amyloid deposition in the efferent ductules of ICI 182,780-treated animals. Identification of new molecular targets for estrogen action may help elucidate the regulatory role of this hormone in the male reproductive tract.
Keywords efferent ductules
gene regulation
male reproductive tract
Language English
Date 2008-09-01
Published in Biology of Reproduction. Madison: Soc Study Reproduction, v. 79, n. 3, p. 432-441, 2008.
ISSN 0006-3363 (Sherpa/Romeo, impact factor)
Publisher Soc Study Reproduction
Extent 432-441
Origin http://dx.doi.org/10.1095/biolreprod.107.067413
Access rights Open access Open Access
Type Article
Web of Science ID WOS:000258580000005
URI http://repositorio.unifesp.br/handle/11600/30862

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